Im skeptical that climate change will ever make humanity extinct. Lead to highly undesirables states, yes, but extinction, no.
I think it's also quite unlikely that climate change, or even results from it, will make humans extinct. Even if climate change triggers some kind of global thermonuclear war, which I think is a small possibility, I'm pretty convinced that humans are here to stay.
Maybe not many of us, but some.
In my opinion, extinction isn't the main worry. Collapse of civilization should be what we're trying to avoid. And that is a real possibility I think.
(As an aside, Im not convinced humans are here to stay, but for very different reasons.)
I hear you, and I agree.